For first time users we suggest you use the Chart Downloader Tab which helps to find and download free charts and is included with the installation of OpenCPN 4.2. If you choose to manually load charts please pay close attention to the following:
Know the path to the the “Chart” directory. Make note of the Charts Folder path you selected.
If you choose to manually download charts, be sure uncompress and install them in your Charts directory
OpenCPN itself does not come with charts.
Charts are a complex subject. Having accurate and current charts is important for safe navigation.
There are a number of resources on this website and others to obtain charts.
However the USA provides free NOAA Charts and many other countries do as well. See Chart Sources below.
Main resource for Charts.
O-Charts.org The easiest least expensive way to purchase charts for most cruising grounds around the world
Chart Files Tab OpenCPN does not come with charts. Description of how to Install Charts.
Chart Downloader Tab Chart Downloader provides an easy way to download and install free NOAA and RNC and ENC charts around the world. It is the easiest way to get started with charts. Download a few charts in your area and use them to learn, then later add more as needed. NOTE: Free charts are not assured everywhere.
Chart Sources Extensive list of free charts available, mostly covered by Chart Downloader Plugin
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High resolution background maps can be obtained through the integrated Chart Downloader plugin see
GSHHS High Resolution Background Use with Watchdog Landfall alarms and WeatherRouting plugins for land detection.
Path to this dataset is stored in the BasemapDir configuration key in opencpn.ini. As long as it points to Contents/SharedSupport/gshhs/, replacing the content of Contents/SharedSupport/gshhs/ makes OpenCPN use it. If BasemapDir points somewhere else, it is not going to be used.
In case GSHHG data is pointed to as a chart folder, it is detected and BasemapDir is changed to point to that location.
Basemap is always displayed, regardless of chart groups.
Keep your GSHHG dataset up to date using ChartDownloader, please.
Background Map (GSHHS Low Res) - Installed, used by Opencpn for the initial rough background map.
Crude resolution basemap is included in the installation package. By default, under macOS, installed in Contents/SharedSupport/gshhs/ subfolder of the application bundle.